Please confirm that the e-license delivery E-mail address is the same as the registered user E-mail address. Basically only the e-license delivery E-mail address can activate the license.
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If still does not work, please contact HP license support teams according to the region list below:
US/Canada:
Call:
+1 (844) 644-3723
(English,Spanish)
Hours:
Mon to Fri, 8am - 8pm
US Eastern
Worldwide:
Email: e-sw-ops-support@hp.com
(English,Spanish)